Serbian defender Ivanovic tapped home the second a few minutes later, netting after Volkan had spilled an Andre Schurrle free-kick - after Costa had been ruthlessly scythed down from behind by Bruno Alves, with a challenge that infuriated the Blues bench.

That result, coupled with Besiktas' win over Fener earlier in the evening, meant the two went into the evening's last 45-minute encounter knowing a win would make them overall winners.